Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '422dfcb417bb7ea9e7aa8cbf08f8b95b83731c8acfb8e5bc10130e8d0b902ea6' 
  AND token = 'F0/iU+YhPVnr19GKhPOslhpaorsTB1o2itiPNsxH1QY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}